Sublime Text YAML

%YAML 1.2
---
name: Plain Text
file_extensions: [txt]
scope: source.c

contexts:
  main:

    - match: \b(Attendee|agenda|item|TITLE|DATE|OWNER|ATTENDEES|AGENDA|ACTIONS|NOTES|RISKS)\b
      scope: keyword.control.c
    - match: ([a-zA-Z0-9.!#$%&'+-/=?\^_`{|}~-]+@[a-zA-Z0-9-]+(?:.[a-zA-Z0-9-]+))
      scope: support.constant punctuation

    - match: ([\[]([P])[\]])
      scope: keyword.control.c
    - match: ([\[]([S])[\]])
      scope: string.quoted.double
    - match: ([\[](REV)[\]])
      scope: entity.name.function punctuation
    - match: ([\[](RET)[\]])
      scope: markup.heading punctuation.definition.heading
    - match: ([\[](ACQ)[\]])
      scope: support.constant punctuation

    - match: ([[:space:]]+{4}(- Item:))
      scope: support.constant punctuation
    - match: ([\t]+{1}(- Item:))
      scope: support.constant punctuation

    - match: ([\[](link)[\]])
      scope: support.constant punctuation
    - match: ([\[].*[\]][\[].*[\]])
      scope: support.constant punctuation
    - match: (^(.*?)\?\?)
      scope: string.quoted.double

    - match: ([[:space:]]+{4}(- [a-zA-Z0-9].*))
      scope: comment
    - match: ([\t]+{1}(- [a-zA-Z0-9].*))
      scope: comment